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三垂線定理
Author:
+x sir
Topic:
Geometry
,
Solids or 3D Shapes
透過模擬打開書頁解釋三垂線定理
GeoGebra
New Resources
空间中两直线的位置关系
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（一）
球体的体积推导（优化版）
兩位數除以一位數（二）
Discover Resources
ie 7
畢氏定理
sine graph (reduce to 1/2 and then translate leftward by 15 degree)
各種四邊形
圓錐曲線
Discover Topics
Cylinder
Combinatorics
Rotation
Hyperbola
Quadrilaterals